Alternative dietary protein and water temperature influence the skin and gut microbial communities of yellowtail kingfish ( Seriola lalandi )

PeerJ

article

Jack Horlick¹  Mark A. Booth²  Sasha G. Tetu¹ 

[1] Department of Molecular Science, Faculty of Science and Engineering, Macquarie University;NSW Department of Primary Industries, Port Stephens Fisheries Institute

关键词: Yellowtail kingfish;    Seriola lalandi;    Microbiome;    Soy-protein concentrate;    Photobacterium;    Aquaculture;    Temperature;    Aquafeed;   

DOI  :  10.7717/peerj.8705

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Fish skin and gut microbiomes contribute to host health and growth and are often significantly different in aquaculture-reared fish compared to wild fish. Determining how factors associated with aquaculture, including altered diet and abiotic conditions, affect the microbiome will assist with optimizing farming practices and non-invasively assessing fish health. Here, juvenile yellowtail kingfish (Seriola lalandi) housed at optimal (22 °C) and non-optimal (26 °C) water temperature were fed a fishmeal control diet or the same diet substituted with 30% soy-protein concentrate (SPC) in order to investigate impacts on host health and the microbial community composition of the skin mucosa, gut mucosa and digesta. Each of these sites was observed to have a distinct microbiome composition. The combination of SPC and housing at 26 °C significantly reduced weight gain in yellowtail kingfish and affected immune parameters. The overall microbial composition and relative abundance of specific operational taxonomic units (OTUs) was also significantly altered by inclusion of SPC at 26 °C, with a notable increase in an OTU identified as Photobacterium in the skin mucosa and digesta. Increased relative abundance of Photobacterium sp. was significantly correlated with reduced levels of digesta myeloperoxidase in yellowtail kingfish; a recognized innate immunity defense mechanism. The changes in the microbial communities of yellowtail kingfish fed a diet containing 30% SPC at 26 °C highlights the importance of considering the interactive effects of diet and environmental factors on microbiome health in farmed yellowtail kingfish.

【 授权许可】

CC BY